C11111333133313232233133313331333131133132313311211111221313311   >>    C1111133313331323223313331333133313113313231331121111122131331   <<    C11111333133313232233133313331333131133132313311211111221313313   >>      C11111333133313232233133313331333131133132313311211111221313312   >>